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Patexia Research
Patent No. US 10952831
Issue Date Mar 23, 2021
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Patent 10952831 - Suction handpiece for a dental treatment unit > Claims

  • 1. A suction handpiece for a dental treatment unit, wherein the suction handpiece comprises a negative pressure connection that is configured to be connected with a negative pressure source of the treatment unit,a saliva connection which is configured to be connected with a saliva suction cannula,an atomized spray connection which is configured to be connected with an atomized spray suction cannula, anda branched flow path which connects the negative pressure connection with both the saliva connection and the atomized spray connection, wherein the flow path includes a branching section in which a negative pressure channel ending on the negative pressure connection divides into a saliva channel ending on the saliva connection and an atomized spray channel ending on the atomized spray connection, andwherein the atomized spray channel at its narrowest point has a first cross sectional area A1 which is at least twice as large as a second cross sectional area A2 at the narrowest point of the saliva channel.
    • 2. The suction hand piece according to claim 1, wherein the ratio m=A1/A2 has a value between 3 and 100.
      • 3. The suction handpiece according to claim 2, wherein the ratio m has a value between 5 and 50.
        • 4. The suction hand piece according to claim 3, wherein the cross sectional area A1 has a value between 25 mm2 and 120 mm2, and the cross sectional area A2 has a value between 1.7 mm2 and 8 mm2.
          • 5. The suction hand piece according to claim 4, wherein the cross sectional area A1 has a value between 35 mm2 and 100 mm2, and the cross sectional area A2 has a value between 2.5 mm2 and 8 mm2.
          • 6. The suction hand piece according to claim 4, wherein the cross sectional area A1 and A2 are circular.
    • 7. The suction handpiece according to claim 1, wherein the negative pressure channel and the atomized spray channel each extend in a straight line and have longitudinal axes aligned with one another.
      • 8. The suction handpiece according to claim 7, wherein the saliva channel has an inclined portion having a longitudinal axis, which is pointing to the branching section, and wherein the longitudinal axis of the saliva channel has an angle to the longitudinal axis of the negative pressure channel which is between 10° and 45°.
        • 9. The suction handpiece according to claim 8, wherein the angle is between 20° and 30°.
      • 10. The suction handpiece according to claim 7, wherein the saliva channel has another section having a longitudinal axis which extends parallel to the longitudinal axis of the atomized spray channel.
    • 11. The suction handpiece according to claim 1, wherein the atomized spray channel has a tapering section directly adjacent to the branching section, and wherein the tapering section has a cross sectional area that is tapered relative to adjacent sections of the atomized spray channel.
      • 12. The suction handpiece according to claim 11, wherein a tapering relative to a section opposite to the branching section is 20% to 35%.
    • 13. The suction handpiece according to claim 1, wherein a cross sectional area of the saliva channel is continuously or stepwise tapered towards the saliva connection.
    • 14. A suction device comprising: the suction handpiece according to claim 1, a saliva suction cannula connected with the saliva connection, and an atomized spray suction cannula connected with the atomized spray connection.
      • 15. The suction device according to claim 14, wherein the saliva suction cannula is plastically bendable and the atomized spray suction cannula is provided with at least one pivotal joint or ball-and-socket joint.
      • 16. The suction device according to claim 14, wherein at least one of the cannulas is detachably connected with the handpiece.
      • 17. The suction device according to claim 14, wherein the saliva suction cannula and the atomized spray suction cannula are formed in such a manner that during treatment a suction end of the saliva suction cannula can be placed in the oral cavity of a patient and one suction end of the atomized spray suction cannula can be placed outside the oral cavity of the patient.
      • 18. The suction device according to claim 14, wherein the atomized spray suction cannula has a suction head fitted in a replaceable manner.
      • 19. The suction device according to claim 14, wherein the saliva suction cannula is provided with a protective cap at the end which has several openings to suck in liquids.
      • 20. The suction device according to claim 14, wherein the atomized spray suction cannula is open at an end and passes into a collecting hopper which, due to its dimensions, cannot be placed in the oral cavity of a patient.
        • 21. The suction device according to claim 20, wherein the collecting hopper has a cross sectional are which is larger than 15 cm2.
  • 22. A suction device for a dental treatment unit comprising a saliva suction cannula,an atomized spray suction cannula, anda suction handpiece comprising a negative pressure connection which is configured to be connected with a negative pressure source of the treatment unit,a saliva connection which is connected with the saliva suction cannula,an atomized spray connection which is connected with the atomized spray suction cannula, anda branched flow path, which connects the negative pressure connection both with the saliva connection and with the atomized spray connection, wherein the flow path includes a branching section on which a negative pressure channel ending on the negative pressure connection divides into a saliva channel ending on the saliva connection and an atomized spray channel ending on the atomized spray connection,whereinthe saliva suction cannula comprises a protective cap at its end having several openings for sucking in liquids, andthe atomized spray suction cannula is open at its end.
    • 23. The suction device according to claim 22, wherein the atomized spray suction cannula at its end passes into a collecting hopper which, due to its dimensions, cannot be placed in the oral cavity of a patient.
      • 24. The suction device according to claim 23, wherein the collecting hopper has a cross sectional area which is larger than 15 cm2.
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